| 摘要 |
Thermal insulation, and method of applying the same, for steam lines or other conduits carrying fluid at temperatures differing from the ambient air or ground temperatures, the structure and the method being useful in new construction and especially in replacement of deteriorated insulation in old construction. A trough-like supporting structure (e.g., the lower half of an original circular casing containing the conduit and original deteriorated insulation) is coated with a permanently flexible waterproof coating, then a body of foamed insulating material is built up on this coating, to encompass the conduit, then a permanently flexible waterproof coating is applied over the body of foamed insulation to join in sealing relation to the waterproof coating previously applied to the supporting structure. Details are given of preferred materials, and of preformed thermal insulation preferably applied to the conduit before the body of foamed insulation is formed, to protect the foamed insulation from possible excessive temperature in the conduit above that for which the foamed insulation is rated.
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